Retrognathia
[醫] 縮頜, 后退頜, 退縮頜
??? 情景例句
I'm glad I got to know you--and your family.
我也很高興能夠認識你和你的一家人。
It's a long story.
真是一言難盡。
How many instruments do you play?
你能演奏多少種樂器？